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ROW HAMMER MONITORING BASED ON STORED ROW HAMMER THRESHOLD VALUE

  • US 20150109871A1
  • Filed: 12/17/2013
  • Published: 04/23/2015
  • Est. Priority Date: 11/30/2012
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a synchronous dynamic random access memory (SDRAM) device, the SDRAM device including;

    a memory array having one or more rows of memory cells;

    a mode register a mode register to store a Maximum Activate Count (tMAC) for the SDRAM device;

    a memory controller coupled to the SDRAM device, the memory controller to include;

    detection logic capable of obtaining the tMAC from the mode register, and capable of monitoring the number of activates within a maximum activate window (tMAW) for the one or more TOWS of the SDRAM device; and

    command and control logic to issue an activate command (ACT) to initiate as target row refresh (TRR) mode if tMAC is exceeded.

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